Meninges: benign postoperative enhancement on MR images.
In a group of 20 postcraniotomy patients who underwent magnetic resonance imaging performed with gadopentetate dimeglumine, 16 (80%) had nonneoplastic meningeal enhancement. This was seen as either enhancement of a local dural membrane or generalized meningeal enhancement. In a control group of 23 patients, only three (13%) had similar findings. The authors believe that postcraniotomy meningeal enhancement is most likely the result of a local inflammatory process or a diffuse chemical arachnoiditis caused by bleeding into the subarachnoid space at the time of surgery. The finding does not necessarily indicate leptomeningeal tumor spread or infection.
Burke
J W
JW
Magnetic Resonance Imaging Laboratory, Huntington Medical Research Institute, Pasadena, CA 91105-3201.
Podrasky
A E
AE
Bradley
W G
WG
D001100:Arachnoiditis / Q000175:diagnosis; D001921:Brain / Q000601:surgery*; D003287:Contrast Media; D003399:Craniotomy; D005682:Gadolinium; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging; D008578:Meninges / Q000473:pathology*; D008581:Meningitis / Q000175:diagnosis; D009942:Organometallic Compounds; D004369:Pentetic Acid; D011183:Postoperative Complications / Q000175:diagnosis*; D012189:Retrospective Studies
D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D005682:Gadolinium; D019786:Gadolinium DTPA